I am getting ready close my 30' above ground pool. The CYA is kinda high at 80 and I was wondering if I need to drain and refill now or can is wait until I re-open my pool in the spring?
Leave alone as you will lose some CYA over the winter, probably to right around where you are going to be. Even if you wind up at 60 in the beginning of the season, you will be near the 40-50 by the middle or end of the season. Thank you.
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